`cppreference.com`

DNSSEC	⚠️ Not signed
A	2606:4700:3030::ac43:bcef^{🇺🇸 Cloudflare2606:4700:3030::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3035::6815:3924^{🇺🇸 Cloudflare2606:4700:3035::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.57.36^{Cloudflare104.21.48.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.188.239^{🇺🇸 Cloudflare172.67.176.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`isabel.ns.cloudflare.com` ⭐
		A	2606:4700:50::a29f:2668^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`isabel.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c268^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`isabel.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2268^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`isabel.ns.cloudflare.com`
		A	108.162.194.104^{🇺🇸 Cloudflare108.162.194.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`isabel.ns.cloudflare.com`
		A	162.159.38.104^{Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`isabel.ns.cloudflare.com`
		A	172.64.34.104^{🇺🇸 Cloudflare172.64.34.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`isabel.ns.cloudflare.com`
NS	`jake.ns.cloudflare.com`
		A	2606:4700:58::adf5:3b7a^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`jake.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c17a^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`jake.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:217a^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`jake.ns.cloudflare.com`
		A	108.162.193.122^{🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`jake.ns.cloudflare.com`
		A	172.64.33.122^{🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`jake.ns.cloudflare.com`
		A	173.245.59.122^{🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`jake.ns.cloudflare.com`
TXT	`v=spf1 ip4:195.201.94.168 ip6:2a01:4f8:1c1a:2e70::1 -all`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4 hints	104.21.57.36, 172.67.188.239
		IPv6 hints	2606:4700:3030::ac43:bcef, 2606:4700:3035::6815:3924
		ECH	X25519, HKDF-SHA256 + AES-128-GCM draft, id=114, name=cloudflare-ech.com
SOA	`isabel.ns.cloudflare.com`dns@cloudflare.com serial=2402535701

`com`

	DNSSEC	🔒 Signed (DS record present)
	NS	`a.gtld-servers.net` ⭐
	NS	`b.gtld-servers.net`
	NS	`c.gtld-servers.net`
	NS	`d.gtld-servers.net`
	NS	`e.gtld-servers.net`
	NS	`f.gtld-servers.net`
	NS	`g.gtld-servers.net`
	NS	`h.gtld-servers.net`
	NS	`i.gtld-servers.net`
	NS	`j.gtld-servers.net`
	NS	`k.gtld-servers.net`
	NS	`l.gtld-servers.net`
	NS	`m.gtld-servers.net`
	SOA	`a.gtld-servers.net`nstld@verisign-grs.com serial=1778378876

rank #6319 globally
rank #3116 in the tld
WOT: SAFE (93/100)
📈 Tranco rank: #20,931

PTR for

137.6.80.208.in-addr.arpa

1.0.0.0.8.3.2.1.0.0.0.0.3.0.0.0.0.0.0.0.0.0.0.0.0.0.f.4.4.0.6.2.ip6.arpa

Subdomains

fr.cppreference.com

de.cppreference.com

ja.cppreference.com

tr.cppreference.com

ko.cppreference.com

zh.cppreference.com

www.cppreference.com

ar.cppreference.com

pt.cppreference.com

es.cppreference.com

mail.cppreference.com

ru.cppreference.com

upload.cppreference.com

en.cppreference.com

pl.cppreference.com

cs.cppreference.com

Same first word

cppreference.com

cppreference.org

DNS History

17 records (6 active, 11 former)

●NSisabel.ns.cloudflare.com2026-04-16 → 2026-05-10 · 3 obs

○ 2026-04-10 17:33:28
● 2026-04-16 20:33:44
● 2026-05-10 02:23:32

●NSjake.ns.cloudflare.com2026-04-16 → 2026-05-10 · 3 obs

○ 2026-04-10 17:33:28
● 2026-04-16 20:33:44
● 2026-05-10 02:23:32

○NSns1.tigertech.net2015-07-12 → 2026-04-10 · 4 obs

● 2015-07-12 23:43:02
● 2026-04-10 17:33:28
○ 2026-04-16 20:33:44
○ 2026-05-10 02:23:32

○NSns2.tigertech.biz2015-07-12 → 2026-04-10 · 4 obs

● 2015-07-12 23:43:02
● 2026-04-10 17:33:28
○ 2026-04-16 20:33:44
○ 2026-05-10 02:23:32

○NSns3.tigertech.org2015-07-12 → 2026-04-10 · 4 obs

● 2015-07-12 23:43:02
● 2026-04-10 17:33:28
○ 2026-04-16 20:33:44
○ 2026-05-10 02:23:32

○MXmx1.tigertech.net2015-07-12 → 2026-04-10 · 4 obs

● 2015-07-12 23:43:02
● 2026-04-10 17:33:28
○ 2026-04-16 20:33:44
○ 2026-05-10 02:23:32

○MXmx2.tigertech.net2015-07-12 → 2026-04-10 · 4 obs

● 2015-07-12 23:43:02
● 2026-04-10 17:33:28
○ 2026-04-16 20:33:44
○ 2026-05-10 02:23:32

○MXmx3.tigertech.net2015-07-12 → 2026-04-10 · 4 obs

● 2015-07-12 23:43:02
● 2026-04-10 17:33:28
○ 2026-04-16 20:33:44
○ 2026-05-10 02:23:32

●A104.21.57.362026-04-18 → 2026-05-10 · 3 obs

○ 2026-04-16 20:33:44
● 2026-04-18 09:44:36
● 2026-05-10 02:23:32

●A172.67.188.2392026-04-18 → 2026-05-10 · 3 obs

○ 2026-04-16 20:33:44
● 2026-04-18 09:44:36
● 2026-05-10 02:23:32

○A208.80.6.1372026-03-04 → 2026-04-16 · 5 obs

○ 2020-03-16 04:51:20
● 2026-03-04 01:23:02
● 2026-04-16 20:33:44
○ 2026-04-18 09:44:36
○ 2026-05-10 02:23:32

○A2604:4f00::3:0:1238:12020-03-16 → 2026-04-16 · 5 obs

○ 2017-02-12 04:36:16
● 2020-03-16 04:51:20
● 2026-04-16 20:33:44
○ 2026-04-18 09:44:36
○ 2026-05-10 02:23:32

●A2606:4700:3030::ac43:bcef2026-04-18 → 2026-05-10 · 3 obs

○ 2026-04-16 20:33:44
● 2026-04-18 09:44:36
● 2026-05-10 02:23:32

●A2606:4700:3035::6815:39242026-04-18 → 2026-05-10 · 3 obs

○ 2026-04-16 20:33:44
● 2026-04-18 09:44:36
● 2026-05-10 02:23:32

○A74.114.88.1282015-07-12 → 2015-07-12 · 3 obs

● 2015-07-12 23:43:02
○ 2015-09-13 19:06:50
○ 2026-05-10 02:23:32

○A74.114.88.1392015-09-13 → 2017-02-12 · 5 obs

○ 2015-07-12 23:43:02
● 2015-09-13 19:06:50
● 2017-02-12 04:36:16
○ 2020-03-16 04:51:20
○ 2026-05-10 02:23:32

○A74.114.90.462020-03-16 → 2020-03-16 · 4 obs

○ 2017-02-12 04:36:16
● 2020-03-16 04:51:20
○ 2026-03-04 01:23:02
○ 2026-05-10 02:23:32

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
cppreference.com	jake.ns.cloudflare.com, isabel.ns.cloudflare.com	12 records

✅ Authoritative Response

Server:108.162.193.122

NS records: jake.ns.cloudflare.com, isabel.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for cppreference.com (unsigned zone)

⏱️ Timing

Total: 200ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`172.67.188.239, 104.21.57.36`
AAAA	2	`2606:4700:3030::ac43:bcef, 2606:4700:3035::6815:3924`
NS	2	`isabel.ns.cloudflare.com, jake.ns.cloudflare.com`
TXT	1	`v=spf1 ip4:195.201.94.168 ip6:2a01:4f8:1`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`isabel.ns.cloudflare.com dns.cloudflare.`

📌 Glue Records Collected

Total: 12

Out-of-bailiwick: 12 (jake.ns.cloudflare.com, jake.ns.cloudflare.com, jake.ns.cloudflare.com...)

Analysis

Hierarchy

cppreference.com is a parent of fr.cppreference.com, de.cppreference.com, ja.cppreference.com, tr.cppreference.com and ko.cppreference.com, plus a few other host names.

IP Addresses

cppreference.com refers to four IP numbers: 2606:4700:3030::ac43:bcef, 2606:4700:3035::6815:3924, 104.21.57.36 and 172.67.188.239.

Other host names, for instance bactrim2018.icu, inpas.com, www.websiteforever.com, 356ka.com and sultanakseptor.com share IP numbers with cppreference.com.

Name Servers

cppreference.com's delegation uses two name servers: isabel.ns.cloudflare.com and jake.ns.cloudflare.com.

cppreference.com uses the same name server setup as other domains, such as solstar.ru, circles.ie, epicroasthouse.com, flamingo.ie and pier26sf.com.

cppreference.com at least partially shares name servers with other domains, including ecofriend-group.com, delphinehomes.com, fracturesounds.com, miss-krista.com and ontic-tech.com.

These name servers are commonly used together with the name servers kim.ns.cloudflare.com, sue.ns.cloudflare.com, bruce.ns.cloudflare.com and rommy.ns.cloudflare.com.

Host names with six IP numbers:

isabel.ns.cloudflare.com points to 2606:4700:50::a29f:2668, 2803:f800:50::6ca2:c268, 2a06:98c1:50::ac40:2268, 108.162.194.104, 162.159.38.104 and 172.64.34.104.

jake.ns.cloudflare.com points to 2606:4700:58::adf5:3b7a, 2803:f800:50::6ca2:c17a, 2a06:98c1:50::ac40:217a, 108.162.193.122, 172.64.33.122 and 173.245.59.122.

cppreference.com - robtex.com